MIC2619YD6-TR Microchip

MIC2619 1.2MHz PWM Boost Converter with OVP General Description Features The MIC2619 is a 1.2MHz pulse width modulated (PWM) 2.8V to 6.5V Input Voltage step-up switching regulator that is optimized for low power, 350mA Switch Current high output voltage applications. With a maximum output Output Voltage up to 35V voltage of 35V, and a switch current of over 350mA, the 1.2MHz PWM Operation MIC2619 can easily supply most high voltage bias applications, such as TV tuners. 1.265V Feedback Voltage Programmable Over-Voltage Protection (OVP) The MIC2619 implements a constant frequency 1.2MHz PWM current-mode control scheme. The high frequency <1% Line Regulation PWM operation saves board space by reducing external <1A Shutdown Current component sizes. The additional benefit of the constant Over-Temperature Protection frequency PWM control scheme as opposed to variable Under-Voltage Lock Out (UVLO) frequency control schemes is lower output noise and smaller input ripple injected back to the battery source. Low Profile Thin SOT-23-6 Package The MIC2619 has programmable overvoltage protection to 40C to +125C Junction Temperature Range ensure output protection in case of fault condition. Applications The MIC2619 is available in a low profile Thin SOT-23 6- pin package. The MIC2619 has a junction temperature Bias Supply Applications: range of 40C to +125C. - Tuner Varactor Bias All support documentation can be found on Micrels web - High Voltage Bias Supplies site at: www.micrel.com. - Avalanche Photo Diode - High Voltage Display Bias DSL/Broadband applications Constant Current Power Supplies Typical Application 1.2MHz Boost Converter with OVP in Thin SOT-23-6 Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC2619 Ordering Information (1) Part Number Marking Overvoltage Junction Temp. Package Lead Finish Protection Range MIC2619YD6 2619 Programmable -40C to +125C Thin SOT-23-6 Lead Free Note: 1. Under bar( ) symbol may not be to scale. Pin Configuration 6-Pin TSOT-23 (YD6) Pin Description Pin Number Pin Name Pin Function 1 SW Switch Node (Input): Internal power bipolar collector. 2 GND Ground. 3 FB Feedback (Input): Output voltage sense node. Connect external resistor network to set output voltage. Nominal feedback voltage is 1.265V. 4 EN Enable (Input): Logic high enables regulator. Logic low shuts down regulator. Do not leave floating. 5 OVP Over-Voltage Protection (Input): Programmable to 35V, adjustable through resistor divider network. 6 VIN Supply (Input): 2.8V to 6.5V for internal circuitry. Requires a minimum 1.0F ceramic capacitor. M9999-030410-A March 2010 2